CN109787299A - The fast charge mode triggering method and system of universal serial bus device - Google Patents
The fast charge mode triggering method and system of universal serial bus device Download PDFInfo
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Abstract
A kind of the fast charge mode triggering method and system of universal serial bus device.The fast charge mode triggering method of universal serial bus device, it include: after the completion of the signal procedure of universal serial bus device, the following steps: the first processing step are executed, the power switch on power end are disconnected, and the connection configuration at correction data end and negative data end is set as short circuit；Power switch on power end is closed by second processing step, and the connection configuration at correction data end and negative data end is continued to keep short circuit, and it is short-circuit configuration that downstream unit, which detects between correction data end and negative data end, at this time, then triggers fast charge mode；Third processing step continues to remain closed the power switch on power end, and the connection configuration at correction data end and negative data end is set as opening a way, to be communicated and be detected whether downstream unit is pulled out；Fourth process step disconnects the power switch on power end, and the connection configuration at correction data end and negative data end is continued to keep open circuit.
Description
Technical field
Disclosed herein content be related universal serial bus (universal serial bus, USB) device
Charge mode triggering method, more particularly to the fast charge mode triggering method and system of universal serial bus device.
Background technique
Universal serial bus (USB) be it is a kind of can support data transmit (correction data end D+ and negative data end through USB
D-) and the electronic device connecting interface of power supply (through the power end VBUS of USB), have heat insertion (hot plug),
The advantages that plug and play (plug and play), attachment device quantity is more, data transmission bauds is fast, supports charge function etc..Cause
This, USB interface has become one of present most common electronic device connecting interface.
In the battery charging specifications (battery charging specification, BC specification) of USB, divide into altogether
Three kinds of charge types: standard down port (standard downstream port, SDP), charging downlink port (charging
Downstream port, CDP) and special charging port (dedicated charging port, DCP).SDP is in form
General USB data transmission mode, but its maximum current that can be provided is 500mA.CDP is similar to SDP, precisely because the maximum that can be provided
Electric current is 1500mA.In addition, DCP is only used for charging, it can not carry out data transmission, the maximum current that can be provided is reachable
1500mA.DCP is also known as fast charge mode or fast charge mode.
The charging unit designed at present for Android (Android) system is broadly divided into following two kinds of modes: if (1)
Charging unit is not required to support data communication, then the DCP charge mode (it can supply larger current) standardized using USB BC, also
It is that correction data end D+ and negative data end D- are fixed to (such as short circuit), so that downstream unit (such as mobile phone) can recognize this charging unit
Charging ability；And (2) if charging unit need to support data communication, the SDP charge mode standardized using USB BC, that is,
Retain the original data transfer function of correction data end D+ and negative data end D-.However, the correction data end D in above-mentioned two kinds of modes
+ and the state of negative data end D- and incompatible (such as: connection configuration, resistance setting, communication protocol are all different), therefore it is most of
Android downstream unit can only support that above-mentioned charge mode is one of in the same time.In addition, at present also there has been no by this two
Kind mode integrate or support simultaneously the method or system of above-mentioned two kinds of modes.
Detailed content and advantage of the invention will be further discussed below among following summary of the invention and embodiment chapters and sections.Only
It will be understood that described below only as being apparent to illustration purpose of the invention, the range being not intended to limit the present invention.
Summary of the invention
The present invention be under background described above produced by, be related to a kind of quick charge of universal serial bus device
Mode triggering method and system, to overcome the above problem.
Inventor proposes the fast charge mode triggering method and system of a kind of universal serial bus device, passes through
By the power switch on USB power source end it is separated in short-term then closure, cause downstream unit to reset and enter new operation mode,
Downstream unit charging can be thus supplied simultaneously and is communicated with downstream unit.By this method, USB BC specification can met
In the case of, on the same channel USB, while reach support " supply downstream unit large current charge (quick charge) " and " with
The function of downstream unit progress data communication (triggering App) ".App is application program (application).
In a state sample implementation of the invention, a kind of fast charge mode triggering side of universal serial bus device is provided
Method.The method includes: standby step, the power switch on the power end of universal serial bus is closed, and make general serial
The correction data end and negative data end of bus are in open circuit, and correction data end and negative data end are SE0 state at this time；Enumerated steps continue
Power switch on power end is remained closed, and makes correction data end and negative data end in open circuit, when downstream unit insertion is general
When universal serial bus, the program of enumerating of universal serial bus is carried out, correction data end and negative data end are J state at this time；Communication steps,
Continue to remain closed the power switch on power end, and make correction data end and negative data end in open circuit, to carry out general serial
The signal procedure of bus, correction data end and negative data end are J state at this time；First processing step opens the electric power on power end
Shutdown is opened, and makes correction data end and negative data end in short circuit；Power switch on power end is closed by second processing step, and
Continue to make correction data end and negative data end in short circuit, downstream unit detects correction data end and negative data end as short-circuit shape at this time
Then state triggers the fast charge mode of downstream unit；Third processing step continues to close the power switch holding on power end
It closes, and makes correction data end and negative data end in open circuit, to be communicated and be detected whether downstream unit is pulled out, correction data end at this time
And negative data end is J state；And fourth process step, the power switch on power end is disconnected, and make correction data end and negative
According to end in open circuit.
In other embodiments of the invention, in the first processing step, second processing step and fourth process step phase
Between, the state at correction data end and negative data end is free position.In addition, during communication steps and third processing step, if just
Data terminal and negative data end are SE0 state, then return to standby step.In addition, working as the lasting period timing knot of fourth process step
Shu Shi then returns to standby step.In addition, enumerated steps, communication steps, the first processing step, second processing step, third are handled
The lasting period of step and fourth process step is set separately in advance according to application demand.
In another aspect of the present invention, a kind of fast charge mode triggering system of universal serial bus device is provided
System.The system includes: power adapter, configures to provide direct current power, includes at least positive electricity source output terminal and negative supply
Output end；Power switch, configure so that universal serial bus electric power conducting or be not turned on comprising input, output end and
Control terminal；And micro-control unit, it configures to execute the fast charge mode triggering method of above-mentioned universal serial bus device,
Including at least positive input/output port, negative input/output port and switch control port.The negative electricity source output terminal of power adapter and logical
It is connected with the ground terminal of universal serial bus.The positive electricity source output terminal of power adapter and the input terminal of power switch connect.Electric power is opened
The output end of pass and the power end of universal serial bus connect.The control terminal of power switch and the switch control terminal of micro-control unit
Mouth connection.Positive input/output port of micro-control unit and the correction data end of universal serial bus connect.Bearing for micro-control unit is defeated
Enter/the negative data end of output port and universal serial bus connects.
In other embodiments of the invention, power switch can be integrated in power adapter.In addition, power adapter
It is AC/DC converter or DC-DC converter.
The embodiment of the present invention also provides a kind of computer program product, wherein the computer program product includes to calculate
Machine medium capable of reading record, the computer-readable medium storing is to store computer program, when by the computer journey
After sequence is loaded and is executed, the fast charge mode triggering method of achievable above-mentioned universal serial bus device.
Detailed description of the invention
Come to describe embodiments of the present invention in detail with reference to the drawings and in a manner of illustrating and is unrestricted.It is readding
After reading embodiment in detailed below and schema, feature and advantage of the invention can should be more understood.
Fig. 1 shows the fast charge mode triggering methods of the universal serial bus device of a state sample implementation according to the present invention
Flow chart.
Fig. 2 indicates the fast charge mode triggering method of the universal serial bus device of a state sample implementation according to the present invention
Timing diagram.
Fig. 3 A indicates the fast charge mode triggering system of the universal serial bus device of a state sample implementation according to the present invention
The schematic diagram of system.
Fig. 3 B indicates the fast charge mode triggering of the universal serial bus device of another state sample implementation according to the present invention
The schematic diagram of system.
Fig. 4 A indicates that the connection configuration of the correction data end D+ and both negative data end D- of universal serial bus are open circuit (open
Circuit schematic diagram).
Fig. 4 B indicates that the connection configuration of the correction data end D+ and both negative data end D- of universal serial bus are short circuit
The schematic diagram of (short circuit).
Fig. 4 C indicates that the state of the correction data end D+ and both negative data end D- of universal serial bus are single-ended 0 (single
Ended zero, SE0) state when schematic diagram.
Fig. 4 D indicates the signal when state of the correction data end D+ and both negative data end D- of universal serial bus are J state
Figure.
Fig. 4 E indicates the schematic diagram (power switch closure) when the power end VBUS conducting of universal serial bus.
Fig. 4 F indicates the schematic diagram (power switch disconnection) when the power end VBUS of universal serial bus is not turned on.
Description of symbols:
100- fast charge mode triggering method；102- step；104- step；106- step；108- step；110- step
Suddenly；112- step；114- step；116- step；The timing diagram of 200- fast charge mode triggering method；30A- quick charge mould
Formula triggers system；30B- fast charge mode triggers system；31- micro-control unit；33A- power adapter；The conversion of 33B- power supply
Device；35- power switch；41- micro-control unit；43- power adapter；45- power switch；47- downstream unit.
Specific embodiment
Firstly, indicating each of the universal serial bus (USB) of embodiment according to the present invention with reference to Fig. 4 A~Fig. 4 F
The schematic diagram of kind connection configuration.Fig. 4 A indicate micro-control unit 41 (micro control unit, MCU) by correction data end D+ and
The connection configuration of negative data end D- is set as the case where open circuit (open circuit).Fig. 4 B indicates micro-control unit 41 by correction data
The case where connection configuration of end D+ and negative data end D- is set as short-circuit (short circuit).
Fig. 4 C indicates that micro-control unit 41 detects the case where state of correction data end D+ and negative data end D- is SE0 state,
It is inserted at this time without downstream unit.The state that Fig. 4 D indicates that micro-control unit 41 detects correction data end D+ and negative data end D- is J shape
The case where state, downstream unit 47 (such as mobile phone) is inserted into universal serial bus at this time.
Fig. 4 E indicates 41 output switch control signal EN of micro-control unit, so that power switch 45 is closed.In the case,
It is connected between the power end VBUS of universal serial bus and the positive electricity source output terminal VDD of power adapter 43, therefore can provide electric power
To downstream unit.Fig. 4 F indicates 41 output switch control signal EN of micro-control unit, so that power switch 45 disconnects.In this situation
Under, it is not turned on, therefore can not mention between the power end VBUS of universal serial bus and the positive electricity source output terminal VDD of power adapter 43
For electric power to downstream unit.
A state sample implementation of the invention is related to the fast charge mode triggering method of universal serial bus device.With reference to Fig. 1,
It indicates the flow chart of the fast charge mode triggering method of the universal serial bus device of a state sample implementation according to the present invention.
The fast charge mode triggering method 100 of universal serial bus device includes following each steps.Firstly, in standby step 102, it will
Power switch closure on the power end VBUS of universal serial bus, so that power end VBUS is connected.In addition, general serial is total
The connection configuration of the correction data end D+ and negative data end D- of line are set as opening a way.At this point, the shape of correction data end D+ and negative data end D-
State is SE0 (single ended zero, single-ended 0) state.
Then, when downstream unit (such as mobile phone) is inserted into universal serial bus, then enter enumerated steps 104
(enumeration).In this step, continue to remain closed the power switch on power end VBUS, and by correction data end D+ and
The connection configuration of negative data end D- keeps open circuit, enumerates program with carry out universal serial bus.At this point, correction data end D+ and negative
The state of data terminal D- is J state, and system is in SDP mode.
After the completion of enumerating program, communication steps are carried out according to peer machine.If Apple System, then for example based on
IAP2 communication protocol (iPod accessory protocol 2.0) Lai Jinhang communication steps 106；If android system, then
Such as based on AOA communication protocol (Android open accessory protocol) Lai Jinhang communication steps 108.It walks herein
Suddenly, continue to remain closed the power switch on power end VBUS, and by the connection configuration of correction data end D+ and negative data end D-
Open circuit is kept, to carry out the signal procedure of universal serial bus.At this point, the state of correction data end D+ and negative data end D- are J shape
State, and system is in SDP mode.In addition, if during communication steps 106 or communication steps 108, detect correction data end D+ and
When the state of negative data end D- is SE0 state, then standby step 102 is returned to.On the other hand, it should be noted that in Apple System
In the case of, fast charge mode can be set by communication process.
Then, at the end of signal procedure is completed or predetermined time timing, the first processing step 110 is carried out.In this step,
Power switch on power end VBUS is disconnected, so that power end VBUS is not turned on.In addition, by correction data end D+ and negative data end
The connection configuration of D- is set as short circuit.
Then, at the end of predetermined time timing, second processing step 112 is carried out.It, will be on power end VBUS in this step
Power switch closure so that power end VBUS is connected again.In addition, continuing the connection by correction data end D+ and negative data end D-
Configuration keeps short circuit.At this point, downstream unit detects the connection configuration of correction data end D+ and negative data end D- as short circuit, thus touch
Send out the fast charge mode of downstream unit.
Then, at the end of predetermined time timing, third processing step 114 is carried out.In this step, continue power end
Power switch on VBUS remains closed, and the connection configuration of correction data end D+ and negative data end D- are set as opening a way, to carry out
Whether communication and detecting downstream unit are pulled out.At this point, the state of correction data end D+ and negative data end D- are J state, and system is
In DCP mode.
Then, when detect downstream unit pulled out or predetermined time timing at the end of, carry out fourth process step 116.
In this step, the power switch on power end VBUS is disconnected, so that power end VBUS is not turned on.In addition, by correction data end D+
And the connection configuration of negative data end D- is set as opening a way.Later, at the end of predetermined time timing, standby step 102 is returned to.
It should be noted that during above-mentioned first processing step 110, second processing step 112 and fourth process step 116,
The correction data end D+ and negative data end D- of universal serial bus can be free position (don ' t care).In addition, in communication steps
108 and third processing step 114 during, if the state for detecting correction data end D+ and negative data end D- is SE0 state, also
It is that downstream unit is pulled out, then returns to standby step 102.
Referring now to Figure 2, the quick charge of its universal serial bus device for indicating a state sample implementation according to the present invention
The timing diagram of mode triggering method.Each step in the timing diagram 200 of fast charge mode triggering method, which corresponds to, quickly fills
Power mode triggering method 100.Among Fig. 2, it is shown that (the conducting or not of the connection configuration of the power end VBUS during each step
Conducting), the connection configuration (open circuit or short circuit) of correction data end D+ and negative data end D- and correction data end D+ and negative data end D-
On signal condition (SE0 or J state).In addition, the lasting period of each step can be such as following (but not limited to this): enumerated steps
104 be smaller than 0.5 second, communication steps 106 be smaller than 0.5 second, the first processing step 110 be smaller than 0.5 second, second processing step
112 it is smaller than 0.5 second, third processing step 114 can be greater than 180 seconds or any time and fourth process step 116 is smaller than 0.5
Second.The lasting period of these steps can also be set separately in advance according to application demand.
Another aspect of the present invention is related to the fast charge mode triggering system of universal serial bus device.With reference to figure
3A indicates the signal of the fast charge mode triggering system of the universal serial bus device of a state sample implementation according to the present invention
Figure.Universal serial bus device fast charge mode triggering system 30A may include: power adapter 33A, power switch 35 and
Micro-control unit 31 (MCU).Power adapter 33A configuration at least may include positive supply output to provide direct current power output
Hold VDD and negative electricity source output terminal VSS.Power switch 35 configure so that universal serial bus electric power conducting or be not turned on, can
Including input, output end and control terminal.The configuration of micro-control unit 31 is fast such as above-mentioned universal serial bus device to execute
Fast charge mode triggering method 100 at least may include positive input/output port, negative input/output port and switch control port.
As shown, the ground terminal GND connection of the negative electricity source output terminal VSS and universal serial bus of power adapter 33A.
The positive electricity source output terminal VDD of power adapter 33A is connect with the input terminal of power switch 35.The output end of power switch 35 and logical
With the power end VBUS connection of universal serial bus.The control terminal of power switch 35 is connect with the switch control port of micro-control unit 31.
The correction data end D+ connection of the positive input/output port and universal serial bus of micro-control unit 31.Bearing for micro-control unit 31 is defeated
Enter/negative data end D- the connection of output port and universal serial bus.With this, micro-control unit 31 can control correction data end D+ and bear
The connection configuration (open circuit or short circuit) of data terminal D-, and detect the signal condition (SE0 on correction data end D+ and negative data end D-
Or J state).The also exportable switch control signal EN of micro-control unit 31 controls the closing or opening of power switch 35, so that
Power end VBUS is connected or is not turned on.When power end VBUS conducting, it is possible to provide downstream unit electric power.
The power switch of another embodiment according to the present invention, fast charge mode triggering system can also be integrated in power supply
In converter.As shown in Figure 3B, the power switch of the fast charge mode triggering system 30B of universal serial bus device is integration
Among power adapter 33B.Therefore, the switch control signal EN of micro-control unit 31 is connected to power adapter 33B, with control
System is integrated in the power switch among power adapter 33B, to determine whether power end VBUS powers or do not power.
In addition, power adapter 33A and power adapter 33B can be AC/DC converter or DC/DC conversion
Device.
Another state sample implementation according to the present invention, it also may include computer-readable that fast charge mode, which triggers system 30A,
Record media (it can be additionally included among micro-control unit 31).The inside of the computer-readable medium storing can store meter
Calculation machine readable medium code.It is achievable such as above-mentioned general serial after 31 loading procedure code of micro-control unit and execution
The fast charge mode triggering method 100 of bus unit.
After detailed description above, it should understand that various features and advantage of the invention.It can pass through above-mentioned various realities
Aspect is applied to complete the triggering of the fast charge mode of universal serial bus device.By above-mentioned power switch mode of operation, when
When downstream unit is inserted into universal serial bus, downstream unit can be made to enter fast charge mode, and communicated.Therefore, originally
Invention can reach in the case where meeting the DCP charge mode of existing USB BC specification, while reaching support and " providing downstream unit
The function of quick charge or large current charge " and the user experience of " being communicated with downstream unit ".
Although describing the present invention with regard to several embodiments, only have usually in related fields will appreciate that base
Many modifications and variation can be made to the present invention in teachings above content.There is usual operator in related fields it will also be appreciated that originally
All modifications so, variation, addition, displacement and its equalization person are covered in invention.Therefore, the present invention is not limited to these embodiment party
Formula, but the content that the true scope including appended claims and spirit are included.
Claims (9)
1. a kind of fast charge mode triggering method of universal serial bus device, characterized by comprising:
Power switch on the power end of universal serial bus is closed by standby step, and just by the universal serial bus
The connection configuration at data terminal and negative data end is set as opening a way, and the correction data end and the negative data end are SE0 state at this time；
Enumerated steps continue to remain closed the power switch on the power end, and continue the correction data end and
The connection configuration at the negative data end keeps open circuit, when downstream unit is inserted into the universal serial bus, carries out described general
Universal serial bus enumerates program, and the correction data end and the negative data end are J state at this time；
Communication steps continue to remain closed the power switch on the power end, and continue the correction data end and
The connection configuration at the negative data end keeps open circuit, to carry out the signal procedure of the universal serial bus, the positive number at this time
It is J state according to end and the negative data end；
First processing step disconnects the power switch on the power end, and by the correction data end and the negative
Short circuit is set as according to the connection configuration at end；
The power switch on the power end is closed by second processing step, and is continued the correction data end and described
The connection configuration at negative data end keeps short circuit, and the downstream unit detects the correction data end and the negative data end at this time
Connecting configuration is short circuit, then triggers the fast charge mode of the downstream unit；
Third processing step continues to remain closed the power switch on the power end, and by the correction data end and
The connection configuration at the negative data end is set as opening a way, described at this time to be communicated and be detected whether the downstream unit is pulled out
Correction data end and the negative data end are J state；And
Fourth process step disconnects the power switch on the power end, and continues the correction data end and described
The connection configuration at negative data end keeps open circuit.
2. the fast charge mode triggering method of universal serial bus device as described in claim 1, which is characterized in that in institute
During stating the first processing step, second processing step and fourth process step, the correction data end and the negative data end are to appoint
Meaning state.
3. the fast charge mode triggering method of universal serial bus device as described in claim 1, which is characterized in that in institute
During stating communication steps and third processing step, if the correction data end and the negative data end are SE0 state, return to standby
Step.
4. the fast charge mode triggering method of universal serial bus device as described in claim 1, which is characterized in that described
Enumerated steps, communication steps, the first processing step, second processing step, third processing step and fourth process step continue
Period is set separately in advance according to application demand.
5. the fast charge mode triggering method of universal serial bus device as claimed in claim 4, which is characterized in that work as institute
At the end of the lasting period timing for stating fourth process step, then the standby step is returned to.
6. a kind of fast charge mode of universal serial bus device triggers system, include:
Power adapter configures to provide direct current power, includes at least positive electricity source output terminal and negative electricity source output terminal；
Power switch, configure so that the universal serial bus electric power conducting or be not turned on comprising input, output end and
Control terminal；And
Micro-control unit, configuration is to execute quickly filling such as universal serial bus device according to any one of claims 1 to 5
Power mode triggering method includes at least positive input/output port, negative input/output port and switch control port；
Wherein, the negative electricity source output terminal of the power adapter is connect with the ground terminal of the universal serial bus, described
The positive electricity source output terminal of power adapter is connect with the input terminal of the power switch, the power switch it is described
Output end is connect with the power end of the universal serial bus, the control terminal of the power switch and the micro-control unit
Switch control port connection, the positive input/output port of the micro-control unit and the universal serial bus are just
Data terminal connection, and the negative data end of the negative input/output port of the micro-control unit and the universal serial bus connects
It connects.
7. the fast charge mode of universal serial bus device as claimed in claim 6 triggers system, which is characterized in that described
Power switch is integrated in the power adapter.
8. the fast charge mode of universal serial bus device as claimed in claim 6 triggers system, which is characterized in that described
Power adapter is AC/DC converter or DC-DC converter.
9. a kind of computer program product, which is characterized in that the computer program product includes computer-readable record matchmaker
Body, the computer-readable medium storing is to store computer program, after by the computer program loads and execution,
The fast charge mode triggering method of achievable universal serial bus device as claimed in any one of claims 1 to 5.
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Application publication date: 20190521 |